Abstract：
PURPOSE:To assess the prevalence of refractive error and vision impairment in school age children in the terai area of the Mechi zone in Eastern Nepal. METHODS:Random selection of village-based clusters was used to identify a sample of children 5 to 15 years of age. Children in the 25 selected clusters were enumerated through a door-to-door household survey and invited to village sites for examination. Visual acuity measurements, cycloplegic retinoscopy, cycloplegic autorefraction, ocular motility evaluation, and anterior segment, media, and fundus examinations were done from May 1998 through July 1998. Independent replicate examinations for quality assurance monitoring took place in all children with reduced vision and in a sample of those with normal vision in seven villages. RESULTS:A total of 5,526 children from 3,724 households were enumerated, and 5,067 children (91.7%) were examined. The prevalence of uncorrected, presenting, and best visual acuity 0.5 (20/40) or worse in at least one eye was 2.9%, 2.8%, and 1.4%, respectively; 0.4% had best visual acuity 0.5 or worse in both eyes. Refractive error was the cause in 56% of the 200 eyes with reduced uncorrected vision, amblyopia in 9%, other causes in 19%, with unexplained causes in the remaining 16%. Myopia -0.5 diopter or less in either eye or hyperopia 2 diopters or greater was observed in less than 3% of children. Hyperopia risk was associated with female gender and myopia risk with older age. CONCLUSIONS:The prevalence of reduced vision is very low in school-age children in Nepal, most of it because of correctable refractive error. Further studies are needed to determine whether the prevalence of myopia will be higher for more recent birth cohorts.
journal_name
Am J Ophthalmoljournal_title
American journal of ophthalmologyauthors
Pokharel GP,Negrel AD,Munoz SR,Ellwein LBdoi
10.1016/s0002-9394(99)00453-5subject
Has Abstractpub_date
2000-04-01 00:00:00pages
436-44issue
4eissn
0002-9394issn
1879-1891pii
S0002939499004535journal_volume
129pub_type
临床试验,杂志文章,随机对照试验abstract：PURPOSE:To describe the ultrasound biomicroscopic features of eyes with aniridia. DESIGN:Observational case series. METHODS:Nineteen eyes of 10 patients with aniridia (six males and four females) ranging in age from 3 months to 53 years (21.0 +/- 16.4, mean +/- SD), and 50 normal subjects (30 men and 20 women) rangin...
journal_title：American journal of ophthalmology
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journal_title：American journal of ophthalmology
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journal_title：American journal of ophthalmology
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更新日期：2009-05-01 00:00:00
abstract：PURPOSE:To assess the relative distribution in the cornea of amyloid and (beta)ig-h3 gene product in lattice corneal dystrophy type IIIA (LCD-IIIA). METHODS:Serial sections from the cornea of a patient with LCD-IIIA were subjected to either Congo red staining or immunohistochemistry employing an antibody to (beta)ig-h...
journal_title：American journal of ophthalmology
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journal_title：American journal of ophthalmology
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journal_title：American journal of ophthalmology
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更新日期：2012-09-01 00:00:00
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journal_title：American journal of ophthalmology
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journal_title：American journal of ophthalmology
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journal_title：American journal of ophthalmology
pub_type： 杂志文章
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更新日期：1977-05-01 00:00:00
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journal_title：American journal of ophthalmology
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更新日期：2010-11-01 00:00:00
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journal_title：American journal of ophthalmology
pub_type： 杂志文章
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更新日期：2006-04-01 00:00:00
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journal_title：American journal of ophthalmology
pub_type： 杂志文章
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更新日期：1988-11-15 00:00:00
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journal_title：American journal of ophthalmology
pub_type： 杂志文章
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journal_title：American journal of ophthalmology
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journal_title：American journal of ophthalmology
pub_type： 杂志文章,多中心研究,随机对照试验
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journal_title：American journal of ophthalmology
pub_type： 杂志文章
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journal_title：American journal of ophthalmology
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更新日期：2019-12-01 00:00:00
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journal_title：American journal of ophthalmology
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更新日期：1986-04-15 00:00:00
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journal_title：American journal of ophthalmology
pub_type： 杂志文章
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journal_title：American journal of ophthalmology
pub_type： 杂志文章,随机对照试验
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更新日期：2017-12-01 00:00:00
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journal_title：American journal of ophthalmology
pub_type： 杂志文章
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更新日期：2004-01-01 00:00:00
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journal_title：American journal of ophthalmology
pub_type： 杂志文章
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更新日期：1981-03-01 00:00:00
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journal_title：American journal of ophthalmology
pub_type： 杂志文章
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更新日期：1976-11-01 00:00:00
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journal_title：American journal of ophthalmology
pub_type： 杂志文章
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更新日期：1979-04-01 00:00:00
abstract：:A retrospective study of 45 patients with low-tension glaucoma revealed the mean age at diagnosis to be 66 years. Seventeen patients had follow-up visual field examinations, the average follow-up period being 6.4 years. There was no significant difference in prognosis of the ocular course between patients with Po/C eq...
journal_title：American journal of ophthalmology
pub_type： 杂志文章
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更新日期：1976-06-01 00:00:00
abstract：:We conducted a retrospective study of 107 penetrating keratoplasties in 99 eyes (99 patients) performed from 1970 to 1979 at the Wills Eye Hospital. The follow-up periods ranged from one to 12 years (median, three years). Overall, 86 of the 107 transplants (80%) remained clear and 63 eyes (59%) achieved good to excell...
journal_title：American journal of ophthalmology
pub_type： 杂志文章
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更新日期：1983-05-01 00:00:00
